A slang name for a lazy eye, basically meaning that one (or sometimes both) of your eyes tend to not look the same way as the other, which makes it confusing for people to know who you're exactly looking at. Probably originates from the bong of which you use to take certain drugs and how when you're high you might have a temporary lazy eye because of the highness.

"Damn, I didn't know if she was looking at me or him because of that stupid bong eye she has."